JP7136675B2 - SEAT DEVICE HAVING LINK MECHANISM AND VEHICLE HAVING SEAT DEVICE - Google Patents

Description

The present invention relates to a seat device having a link mechanism and a vehicle having the seat device.

As a vehicle seat that changes the inclination angle of the seat surface when it is moved back and forth, a slide rail that slidably supports the seat cushion of the passenger seat is disposed in the vehicle interior in an upwardly inclined state. In addition, in a seat position adjusting device for an automobile, in which the seat cushion is slidably displaced in the longitudinal direction of the vehicle body along the slide rail, the seat cushion is interlocked with the operation of slidingly displacing the seat cushion in the longitudinal direction of the vehicle body. A tilting means is provided for changing the inclination angle of the seat surface by swinging the seat cushion, and the tilting means moves the rearwardly downwardly inclined seat surface when the seat cushion is slidably displaced toward the front side of the vehicle body. There has been proposed a seat position adjusting device for an automobile, characterized in that it is constructed so as to decrease the tilt angle and increase the rate of change of the tilt angle as the seat cushion approaches the front position. (Patent Document 1).

Advantageous Effects of Invention According to the present invention, it is possible to appropriately secure the passenger's field of vision and driving operability in accordance with the operation of adjusting the front-rear position of the passenger's seat in accordance with the physique of the passenger.

However, such a seat position adjusting device requires a sliding operation to move the seat, and the seat cannot be moved only by weight shift.

JP 2006-273021 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat device having a link mechanism that allows the position of the seat to be moved only by the movement of the occupant's weight and changes the inclination angle of the seat surface in conjunction with the movement. and

In order to achieve the above object, the present invention employs the following means.

A seat device having a link mechanism according to the present invention includes:
a seat; a first link rotatably supported in the front-rear direction of the seat with respect to a supporting bottom surface;
A second link supported behind the first link so as to be rotatable in the front-rear direction with respect to the support bottom; and a third link connected to the first link so as to be rotatable in the front-rear direction at one end thereof. ,
a fourth link having one side end rotatably connected to the second link in the front-rear direction;
a rotating portion to which the third link and the fourth link are rotatably connected;
A first elastic body, the other end of which is fixed to the outside so as to urge the first link in the rotational direction, and the other end of which is externally fixed so as to urge the second link in the rotational direction. at least one or more elastic bodies selected from a fixed second elastic body and a third elastic body having the other end portion fixed to the support bottom surface so as to vertically bias the rotating portion;
and a link mechanism for fixing the seat;
characterized by comprising

According to the present invention, by holding the link mechanism with an elastic body, the seat can be moved forward and backward by applying force to the seat in the front-rear direction by shifting the weight. Therefore, the position of the seat can be changed without external operation. Further, when the sheet is moved, the inclination of the sheet can be changed in conjunction with the movement of the sheet.

Further, the seat device having the link mechanism according to the present invention is
a seat; a first link rotatably supported in a lateral direction of the seat with respect to a supporting bottom surface;
A second link supported on the side of the first link to be rotatable in the lateral direction with respect to the support bottom; 3 links and
a fourth link having one side end rotatably connected to the second link in a lateral direction;
a rotating portion to which the third link and the fourth link are rotatably connected;
A first elastic body, the other end of which is fixed to the outside so as to urge the first link in the rotational direction, and the other end of which is externally fixed so as to urge the second link in the rotational direction. at least one or more elastic bodies selected from a fixed second elastic body and a third elastic body having the other end portion fixed to the support bottom surface so as to vertically bias the rotating portion;
and a link mechanism for fixing the seat;
characterized by comprising

In the above-described invention, the link mechanism is held by the elastic body, so that the seat can be moved left and right by applying force in the lateral direction by shifting the weight of the seat. Therefore, the position of the seat can be changed without external operation. Further, when the sheet is moved, the inclination of the sheet can be changed in conjunction with the movement of the sheet.

Further, the seat device having the link mechanism according to the present invention is
a seat; a first link, a second link, a third link, and a fourth link arranged on the front, rear, left, and right under the seat and connected to the support bottom surface by universal joints;
a fifth link, a sixth link, a seventh link and an eighth link each having one end connected to the first link, the second link, the third link and the fourth link by a universal joint;
a freely movable portion connected to the other side end portions of the fifth link, the sixth link, the seventh link, and the eighth link so as to be capable of freely changing directions;
four first elastic bodies attached so as to bias the first link, the second link, the third link and the fourth link in one direction and the opposite direction, respectively;
two second elastic bodies attached to both sides of the freely movable part so as to be perpendicular to the first elastic body in the horizontal direction;
a third elastic body provided between a lower portion of the freely movable portion and a support bottom surface;
and a link mechanism for fixing the seat;
characterized by comprising

In the above invention, a universal joint is used in the connection part of the link mechanism, and the link mechanism is held by an elastic body, so that force can be applied to the seat in all directions in the horizontal direction by shifting the weight. , the sheet can be moved in the direction in which the force is applied. Therefore, the position of the seat can be changed without external operation. Further, when the sheet is moved, the inclination of the sheet can be changed in conjunction with the movement of the sheet.

Further, in the seat device having the link mechanism according to the present invention, a cylinder is used instead of the elastic bodies constituting the first elastic body, the second elastic body and the three elastic bodies. There may be.

A similar effect can be obtained by using a cylinder instead of the elastic body.

Furthermore, in the seat device having the link mechanism according to the present invention, the link mechanism may include a damper.

By providing the damper, it is possible to prevent the sheet from moving abruptly and greatly even when a large force is suddenly applied to the sheet.

Further, in the seat device having the link mechanism according to the present invention, the link mechanism may have a lock mechanism for locking movement of the link.

By providing the locking mechanism, the position of the seat can be fixed when it is not desired to move the seat. In addition, it becomes possible to hold the position in a moved state.

Further, in the seat device having the link mechanism according to the present invention, the link mechanism may be provided with a movable device.

By adopting such a configuration, the position of the seat can be changed by means other than shifting the weight.

A seat device having the link mechanism described above can be used as a vehicle seat.

According to the seat rail device of the present invention, the seat has a link mechanism that allows the position of the seat to be moved only by the movement of the occupant's weight and changes the inclination angle of the seat surface in conjunction with the movement. Equipment can be provided.

FIG. 1 is a side view showing a seat device 100 having a link mechanism 20 according to the first embodiment. FIG. 2 is a perspective view of a seat device 100 (with the seat 10 omitted) having the link mechanism 20 according to the first embodiment. FIG. 3 is a side view showing another embodiment of the seat device 100 having the link mechanism 20 according to the first embodiment. FIG. 4 is a side view showing a state in which a person is seated on the seat device 100 having the link mechanism 20 according to the first embodiment. FIG. 5 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the first embodiment shifts his or her weight rearward. FIG. 6 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the first embodiment shifts his or her weight forward. FIG. 7 is a side view showing the seat device 100 having the link mechanism 20 according to the second embodiment. FIG. 8 is a side view showing a state in which a person is seated on the seat device 100 having the link mechanism 20 according to the second embodiment. FIG. 9 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the second embodiment shifts his/her weight backward. FIG. 10 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the second embodiment shifts his or her weight forward. FIG. 11 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the third embodiment shifts his or her weight forward. FIG. 12 is a side view showing a state in which a person sitting on the seat device 100 having the link mechanism 20 according to the fourth embodiment shifts his or her weight forward. FIG. 13 is a perspective view showing a seat device 100 having a link mechanism 20 according to the fifth embodiment. FIG. 14 is a perspective view showing the freely movable portion 75 of the seat device 100 having the link mechanism 20 according to the fifth embodiment. FIG. 15 is a side view showing another embodiment of the seat device 100 having the link mechanism 20 according to each embodiment.

An embodiment of a seat device 100 having a link mechanism 20 according to the present invention will be described in detail below with reference to the drawings. It should be noted that the embodiments and drawings described below illustrate a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations. Also, the same or similar reference numerals are assigned to corresponding components in each figure. In the following description, the front and rear of the seat 10 are referred to as the "front and rear direction."

(First embodiment)
A seat device 100 having a link mechanism 20 according to the first embodiment is shown in FIGS. 1 and 2. FIG. FIG. 1 is a side view showing a seat device 100 having a link mechanism 20 according to the first embodiment, and FIG. ) is a perspective view.

A seat device 100 having a link mechanism 20 according to the first embodiment mainly includes a seat 10 and a link mechanism 20 that supports the seat 10, as shown in FIG.

The seat 10 is not particularly limited as long as it can be seated on.

The link mechanism 20 includes at least four links (31-34) and three elastic bodies (41-43). The four links (31 to 34) are a first link 31 supported to be rotatable in the front-rear direction with respect to the support bottom surface 50, and a first link 31 arranged behind the first link 31 and arranged forward and backward with respect to the support bottom surface 50. One side end portion 33a of the first link 31 rotates in the front-rear direction with respect to the first link upper end portion 31a of the first link 31 by the first rotation shaft portion 36. A third link 33 which is rotatably connected, and a fourth link whose one side end 34a is connected to the upper end 32a of the second link 32 by a second rotating shaft 37 so as to be rotatable in the front-rear direction. 34 and . The third link 33 and the fourth link 34 are connected so as to intersect each other at a third rotation shaft portion 38 so as to be rotatable in the front-rear direction. In this way, a five-section closed link structure is formed as a whole. One side end portion 41a of the first elastic body 41 is attached to the first rotation shaft portion 36 of the first link 31 and the third link 33, and the other side end portion 41b is fixed to an external member. , and the position of the other end 41b is not changed. One side end portion 42a of the second elastic body 42 is attached to the second rotation shaft portion 37 of the second link 32 and the fourth link 34, and the other side end portion 42b is attached to an external member. It is fixed, and the position of the other end 42b is not changed. In the first embodiment, the first elastic body 41 or the second elastic body 42 is provided on the first rotating shaft portion 36 and the second rotating shaft portion 37, respectively. They may be provided directly in the middle of the first link 31 or the second link 32, respectively. Further, the third elastic body 43 is connected to the support bottom surface 50 and the third pivot shaft portion 38, which is the intersection of the third link 33 and the fourth link 34, so that the seat 10 can rotate vertically when no force is applied to it. are placed in A helical spring is used for each of the first to third elastic bodies 41 to 43 .

The seat 10 is attached to the tips of the third link 33 and the fourth link 34 via the bracket 11 . The bracket 11 is mounted so as to be slidable within the bracket 11 so as to be able to move between the changing distances because the widths of the tips of the third link 33 and the fourth link 34 are movable. Specifically, the other side end portion 33b of either the third link 33 or the fourth link 34 (in this embodiment, the third link 33) is provided rotatably with respect to the seat 10, and the other A link (the fourth link 34 in this embodiment) is attached to the bracket 11 by providing an elongated hole so as to be slidable.

As shown in FIG. 2, the link mechanisms 20 are provided on the left and right sides of the seat 10 so that the seat 10 can be attached more stably. It is preferable that the portions 36, the second rotating shaft portions 37, and the third rotating shaft portions 38 are connected to each other by a rotating shaft. With such a configuration, the link mechanism 20 can be made more rigid.

The seat device 100 manufactured in this way is adjusted so that the respective elastic bodies are balanced with the seating surface of the seat 10 in a horizontal state. maintained. When a person sits on the seat 10 in this state, as shown in FIG. The seat 10 moves downward while maintaining a horizontal state. That is, the seating surface will sink slightly. From this state, when the weight is moved rearward and the load is moved rearward, as shown in FIG. The 2nd link 32 and the 4th link 34 move so that the mutual angle β becomes small. As a result, the seat 10 moves rearward as a whole. At this time, as shown in FIG. 5, the length A from the third rotation shaft portion 38 of the third link 33 to the rotation center of the tip of the bracket 11 side and the third rotation shaft portion of the fourth link 34 Depending on the length ratio of the length B from 38 to the center of rotation of the tip of the bracket 11 side, it is possible to adjust the tilt direction and degree of tilt of the seat 10 according to the distance that the seat 10 moves rearward. If B is formed longer than A, as shown in FIG. 5, as the seat 10 moves rearward, the rear side moves higher. On the other hand, if B is shorter than A, the rear side of the seat 10 moves lower as it moves rearward. Further, if the difference between the lengths of A and B increases, the inclination of the sheet 10 can be increased. Therefore, the length A from the third rotation shaft portion 38 of the third link 33 to the center of rotation of the tip of the bracket 11 side, and the distance from the third rotation shaft portion 38 of the fourth link 34 to the tip of the bracket 11 side By appropriately selecting the length B to the center of rotation, it is possible to optimize the movement and inclination of the seat. Conversely, when a load is applied forward while shifting the weight forward, the first link 31 and the third link 33 move so that the mutual angle α becomes smaller, as shown in FIG. 32 and the fourth link 34 move so as to increase the angle β with respect to each other. As a result, the seat 10 moves forward as a whole. At this time, as in the case of moving backward, the length A from the third rotation shaft portion 38 of the third link 33 to the rotation shaft at the tip of the bracket 11 side and the third rotation of the fourth link 34 The inclination of the seat 10 according to the distance that the seat 10 moves rearward can be adjusted by the length ratio of the length B from the shaft portion 38 to the rotation axis at the tip of the bracket 11 side. If B is longer than A, as shown in FIG. 6, as the seat 10 moves forward, the rear side moves lower. On the other hand, if B is shorter than A, the rear side of the seat 10 moves higher as it moves forward. Further, if this difference becomes large, the inclination of the sheet 10 can be increased.

In this manner, according to the seat device 100 having the link mechanism 20 according to the first embodiment, the front-rear position of the seat 10 can be changed only by shifting the weight without any special operation for moving the seat 10. be able to. Moreover, the inclination of the seat 10 can be changed according to the movement, and an appropriate inclination of the seat 10 can be ensured according to the front-rear position of the seat 10 .

(Second embodiment)
A seat device 100 having a link mechanism 20 according to the second embodiment is shown in FIG. A seat device 100 according to the second embodiment differs from the link mechanism 20 according to the first embodiment in the structure for attaching the seat. The link mechanism 20 according to the second embodiment includes at least four links (31-34) and three elastic bodies (41-43), and the connection structure of each link is the same as in the first embodiment. is. In the link mechanism according to the second embodiment, the third rotation shaft portion 38 formed by the third link 33 and the fourth link 34 is connected to each other at the other end portions, and the rotation from the third rotation shaft portion 38 is performed. The difference is that each link does not extend so as to protrude. The seat 10 includes a support member 70 fixed to a rod-shaped third rotation shaft 38a (a part corresponding to 38a in FIG. 2) that is installed between the third rotation shaft portions 38 of the link mechanisms 20 arranged on the left and right sides. It is attached by being fixed to the bracket 11 . The third rotating shaft 38a is fixed only to either the third link 33 or the fourth link 34, and is freely rotatable with respect to the other. Other configurations are the same as those of the first embodiment.

The seat device 100 manufactured in this manner is adjusted so that the respective elastic members are balanced when the seating surface of the seat 10 is horizontal, and the horizontal state is maintained when no force is applied. When a person sits on the seat 10 in this state, as shown in FIG. , and the sheet 10 moves downward while maintaining a horizontal state. The first link 31 and third link 33 and the second link 32 and fourth link 34 are bent at substantially the same angle, and the seat 10 moves downward while maintaining a horizontal state. That is, the seating surface will sink slightly. From this state, when a load is applied while shifting the weight to the rear side, the first link 31 and the third link 33 move so that the mutual angle α increases, and the second link moves, as shown in FIG. 32 and the fourth link 34 move so that the mutual angle β becomes smaller. As a result, the seat 10 moves rearward as a whole. At this time, the third rotating shaft 38a moves so that the angle γ with the vertical direction of the third link 33 decreases, and the angle δ with the vertical direction of the fourth link 34 increases. The third rotating shaft 38a rotates in a direction in which the front side of the seat 10 is lowered (in the direction of the arrow shown in FIG. 9) regardless of whether the third rotating shaft 38a is fixed to the third link 33 or the fourth link 34. Therefore, as the seat 10 is moved rearward, the rear of the seat 10 is raised. Conversely, when a force is applied while moving the weight forward, the first link 31 and the third link 33 move so that the angle α between them becomes smaller, and the second link 32 and the second link 32 move. The fourth links 34 move so that the angle β increases with respect to each other. As a result, the seat 10 moves forward as a whole. At this time, the third rotation shaft 38a moves so that the angle γ with the vertical direction increases for the third link 33 and the angle δ with the vertical direction for the fourth link 34, contrary to the case of moving backward. Therefore, the third rotating shaft 38a rotates in the direction in which the front side of the seat 10 becomes higher regardless of whether it is fixed to the third link 33 or the fourth link 34 (Fig. 10). Therefore, as the seat 10 moves forward, the rearward portion of the seat 10 is lowered.

In this way, according to the seat device 100 according to the second embodiment, the front-rear position of the seat 10 can be changed only by shifting the weight without any special operation for moving the seat 10 . Moreover, the inclination of the seat 10 can be changed according to the movement, and an appropriate inclination of the seat 10 can be ensured according to the front-rear position of the seat 10 .

(Third embodiment)
A seat device 100 having a link mechanism 20 according to the third embodiment is shown in FIG. Unlike the link mechanism 20 according to the second embodiment, the seat device 100 according to the third embodiment does not have the third elastic body 43 fixed to the support bottom surface 50, and the moving body 51 movable in the front-rear direction. The difference is that they are provided. As the movable body 51, for example, an upper rail of a slide rail, which is composed of a lower rail on the support bottom surface 50 and an upper rail movably provided on the lower rail, or the like can be considered. Since the configuration other than this is the same as that of the second embodiment, description thereof is omitted.

According to the seat device 100 according to the third embodiment, even when the seat 10 is moved back and forth, the verticality of the third elastic body 43 is maintained, so that the seat is obliquely stretched as in the second embodiment. The third elastic body 43 prevents force from being applied in an oblique direction. Therefore, the seat 10 can be smoothly moved in the front-rear direction without applying excessive force.

The configuration of the moving body 51 of the third elastic body 43 may be used in combination with the first embodiment.

(Fourth embodiment)
A seat device 100 having a link mechanism 20 according to the fourth embodiment is shown in FIG. In the seat device 100 according to the fourth embodiment, the link mechanism 20 according to the first embodiment is arranged so as to be movable in the longitudinal direction with respect to the seat 10, whereas the link mechanism 20 is arranged on the seat 10. It is different in that it is rotated by 90° in the horizontal direction. The link mechanism 20 itself is similar to that of the first embodiment.

According to the seat device 100 having such a link mechanism 20, the seat device 100 can have the seat 10 that can move in the lateral direction, that is, in the left-right direction. That is, by applying a load in the lateral direction, the seat 10 can be moved in the horizontal direction in the same motion as in the first embodiment, and when the seat 10 is moved in the horizontal direction, the lateral inclination of the seat 10 can be reduced. can be changed.

The configuration in which the seat 10 is horizontally rotated by 90 degrees with respect to the link mechanism 20 may be used in combination with the link mechanism 20 of the second embodiment and the third embodiment.

(Fifth embodiment)
A seat device 100 according to the fifth embodiment is shown in FIG. A seat device 100 according to the fifth embodiment mainly includes a seat 10 (represented by a dotted line) and a link mechanism 20 that supports the seat 10, as shown in FIG.

The link mechanism 20 has eight links and seven elastic bodies. The eight links (61 to 68) are arranged on the front, back, left and right of the seat 10 so as to form a quadrangle when viewed from above, and are bent and movable in all directions with respect to the support bottom surface 50. Four first links 61, second links 62, third links 63 and fourth links 64 fixed by universal joints), and first universal joints capable of bending and moving in all directions on these four links. 71 , a fifth link 65 , a sixth link 66 , a seventh link 67 and an eighth link 68 , one end of which is connected to the second universal joint 72 , the third universal joint 73 , and the fourth universal joint 74 . I have. The other side ends of the fifth link 65, the sixth link 66, the seventh link 67, and the eighth link 68 are respectively formed with a freely movable portion 75 that is connected by a universal joint that is freely movable. . For example, as shown in FIG. 14, the freely movable portion 75 has storage areas in which the spheres can be stored in four directions. A form in which a sphere formed at the other end of the eighth link 68 is fitted may be used. A seat support member 90 is provided on the top surface of the freely movable portion 75 , and the seat 10 is attached to the seat support member 90 . It also has four first elastic bodies (81-84) connected to the first universal joint 71, the second universal joint 72, the third universal joint 73, and the fourth universal joint 74, respectively, all of which are horizontal. , are arranged parallel to each other, and the end opposite to the universal joint is attached to an external member (not shown) of the link mechanism 20 to fix its position. The first elastic bodies 81 and 82 connected to the first universal joint 71 and the second universal joint 72 are horizontally urged in one direction, and the first elastic bodies 81 and 82 connected to the third universal joint 73 and the fourth universal joint 74 Bodies 83, 84 are biased in opposite directions. Two second elastic bodies 85 and 86 are provided on both sides of the freely movable section 75 so as to be orthogonal to the first elastic body 81 in the horizontal direction, and are connected to the freely movable section 75. The opposite end is attached to an external member (not shown) to fix the position. Further, the freely movable portion 75 is provided with a third elastic body 87 that is connected to the support bottom surface 50 and biases it in the vertical direction.

The link mechanism 20 manufactured as described above includes a combination of the first link 61, the second link 62, the fifth link 65 and the sixth link 66, the second link 62, the third link 63, the sixth link 66 and the a combination of the 7 links 67, a combination of the third link 63, the fourth link 64, the seventh link 67 and the eighth link 68, a combination of the first link 61, the fourth link 64, the fifth link 65 and the eighth link 68; Each of the combination of the first link 61, the third link 63, the fifth link 65 and the seventh link 67 and the combination of the second link 62, the fourth link 64, the sixth link 66 and the eighth link 68 has a five-section closed A link structure is formed. Since each link is connected by a universal joint, the seat 10 can be moved in all directions of 360° in the horizontal direction, and according to the principle of the above-described embodiment, the side of the seat 10 which has been moved is tilted higher. It will be.

It should be noted that the present invention is not limited to the above-described embodiments, and can be implemented in various forms within the technical scope of the present invention.

In the above-described embodiment, a helical spring is used as an elastic body, but a cylinder such as an air cylinder or a hydraulic cylinder may be used instead of the helical spring.

Also, in the embodiments described above, one or more dampers 91 may be attached as shown in FIG. By attaching the damper 91, it is possible to prevent the seat 10 from suddenly moving even when a strong force is applied in the moving direction.

Furthermore, in the above-described embodiment, a lock mechanism 92 that can lock the seat 10 at a predetermined position may be provided. As the lock mechanism 92, for example, a reclining device for an automobile seat or the like can be attached to the rotating portion of the link.

Furthermore, in the embodiment described above, a movable device may be provided so as to automatically move the seat 10 to a predetermined position. For example, this can be achieved by interlocking a motor 93 with a reclining device 92 of an automobile seat to the rotating portion.

The seat device 100 having the link mechanism 20 according to each embodiment described above is preferably applied to a vehicle seat, particularly an automobile seat. A vehicle equipped with a seat device 100 having a link mechanism 20 can change the position of the seat 10 simply by shifting the weight.

Although an example having all the first to third elastic bodies 41 to 43 of the seat device according to the above-described first to fourth embodiments has been shown, it is not necessary to have all of them. Or it may be only any two. Compared to the case where three elastic bodies are attached, it is necessary to use an elastic body having a stronger elastic force, but a similar effect can be obtained. Similarly, when a cylinder is used instead of the elastic body, either one or only two may be used.

As shown in the above-described embodiment, it can be industrially used as a vehicle seat.

DESCRIPTION OF SYMBOLS 10... Seat 11... Bracket 20... Link mechanism 31... First link 31a... Upper end of first link 32... Second link 33... Third link 33a... One side end 33b... Other side end 34 Fourth link 34a One end 36 First rotation shaft 37 Second rotation shaft 38 Third rotation shaft 38a Third rotation Axle 40 Elastic body 41 First elastic body 41 a One side end 41 b Other side end 42 Second elastic body 42 a One side end 42 b Other side end 43 3rd elastic body 50 Support bottom surface 51 Moving body 61 First link 62 Second link 63 Third link 64 Fourth link 65 Fifth link 66 Sixth Link 67...Seventh link 68...Eighth link 70...Supporting member 71...First universal joint 72...Second universal joint 73...Third universal joint 74...Fourth universal joint 75...Universal Movable portion 80 Universal joint 81, 82, 83, 84 First elastic body 85, 86 Second elastic body 87 Third elastic body 90 Seat support member 91 Damper 92 Lock Mechanism 93 Motor 100 Seat device

Claims (8)

In a seat device having a link mechanism,
a seat;
a first link rotatably supported in the front-rear direction of the seat with respect to the support bottom surface;
a second link supported rearward of the first link so as to be rotatable in the front-rear direction with respect to the support bottom surface;
a third link having one end thereof connected to the first link so as to be rotatable in the front-rear direction;
a fourth link having one side end rotatably connected to the second link in the front-rear direction;
a rotating portion to which the third link and the fourth link are rotatably connected;
A first elastic body, the other end of which is fixed to the outside so as to urge the first link in the rotational direction, and the other end of which is externally fixed so as to urge the second link in the rotational direction. at least one or more elastic bodies selected from a fixed second elastic body and a third elastic body having the other end portion fixed to the support bottom surface so as to vertically bias the rotating portion;
and a link mechanism for fixing the seat;
A seat device having a link mechanism, comprising: In a seat device having a link mechanism,
a seat;
a first link rotatably supported in a lateral direction of the seat with respect to the supporting bottom surface;
A second link supported on the side of the first link to be rotatable in the lateral direction with respect to the support bottom; 3 links and
a fourth link having one side end rotatably connected to the second link in a lateral direction;
a rotating portion to which the third link and the fourth link are rotatably connected;
A first elastic body, the other end of which is fixed to the outside so as to urge the first link in the rotational direction, and the other end of which is externally fixed so as to urge the second link in the rotational direction. at least one or more elastic bodies selected from a fixed second elastic body and a third elastic body having the other end portion fixed to the support bottom surface so as to vertically bias the rotating portion;
and a link mechanism for fixing the seat;
A seat device having a link mechanism, comprising: In a seat device having a link mechanism,
a seat;
a first link, a second link, a third link, and a fourth link arranged on the front, rear, left, and right under the seat and connected to the support bottom surface by universal joints;
a fifth link, a sixth link, a seventh link and an eighth link each having one end connected to the first link, the second link, the third link and the fourth link by a universal joint;
a freely movable portion connected to the other side end portions of the fifth link, the sixth link, the seventh link, and the eighth link so as to be capable of freely changing directions;
four first elastic bodies attached so as to bias the first link, the second link, the third link and the fourth link in one direction and the opposite direction, respectively;
two second elastic bodies attached to both sides of the freely movable part so as to be perpendicular to the first elastic body in the horizontal direction;
a third elastic body provided between a lower portion of the freely movable portion and a support bottom surface;
and a link mechanism for fixing the seat;
A seat device having a link mechanism, comprising: The link mechanism according to any one of claims 1 to 3, wherein cylinders are used instead of the elastic bodies constituting the first elastic body, the second elastic body and the third elastic body. A seat device having A seat device having a link mechanism according to any one of claims 1 to 4, wherein the link mechanism comprises a damper. 6. A seat apparatus having a link mechanism according to claim 1, wherein said link mechanism has a lock mechanism for locking movement of the link. A seat device having a link mechanism according to any one of claims 1 to 6, wherein the link mechanism comprises a movable device. A vehicle equipped with a seat device having the link mechanism according to any one of claims 1 to 7.

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